CN107269700A - A kind of dynamic mesh update method of the radial oil film bearing based on Fluent - Google Patents
A kind of dynamic mesh update method of the radial oil film bearing based on Fluent Download PDFInfo
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- CN107269700A CN107269700A CN201710430240.9A CN201710430240A CN107269700A CN 107269700 A CN107269700 A CN 107269700A CN 201710430240 A CN201710430240 A CN 201710430240A CN 107269700 A CN107269700 A CN 107269700A
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- dynamic mesh
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
A kind of dynamic mesh update method of the radial oil film bearing based on Fluent, comprises the following steps：（1）Create bearing film grid file；（2）UDF controls writing for macroprogram in Fluent softwares；（4）Utilize Excel instruments pair（3）In obtained data file handled；（5）Start fluid calculation software Fluent, import grid file, carry UDF programs simultaneously set UDF control conditions；（6）Utilize UDF dynamic mesh programme-control Flow Field Calculations；（7）Judge whether journal centre track restrains.The present invention solves the problem of bearing film grid length-width ratio is excessive easily to occur mesh distortion in dynamic mesh motion, it is ensured that the grid lines of radial direction is along the circumferential direction first-class before and after mobile is distributed.During calculating dynamic mesh node coordinate using this method, make grid lines all the time perpendicular to journal surface, grid is not distorted deformation, it is to avoid the cumulative errors of grid computing, accelerate the calculating speed of bearing performance.
Description
Technical field
The invention belongs to filmatic bearing and its rotor-support-foundation system performance computing technique field, and in particular to one kind is based on Fluent
Radial oil film bearing dynamic mesh update method.
Background technology
When carrying out filmatic bearing dynamic performance calculation, the journal centre of rotor is in whirling motion, the absolute speed of journal surface each point
Degree and acceleration are different, and the shape of computational flow and kinematics parameters moment are changing, and can not be carried out using quiet grid model
Calculate.Dynamic mesh model can change with time for simulating the basin caused by Boundary motion, in single-phase flow and many
Mutually flow down and be applicable.Boundary motion can be compulsory exercise（For example, user can define the speed and angular speed at rigid body center）,
Can also need action to be solved（For example, determining the speed of subsequent time with solving result under six degrees of freedom model, accelerating
Degree, angular speed, angular acceleration）.For dynamic mesh model, user it needs to be determined that initial mesh and moving region.Conventional fluid
Performance software for calculation Fluent provides three kinds of dynamic mesh more new algorithms：Smoothing、Layering、Remeshing.According to
The change of moving boundaries, Fluent softwares are automatically updated to specified grid.Smoothing methods are smoothing method, and feature is
Topological relation grid node is not changed, the change of mesh shape is only carried out, is easily sent out when grid distorts
Dissipate.Layering methods are the movements with moving boundary, occur the increase or merging of grid in boundary.Remeshing methods
It is, by all grid reoderings in control zone, to apply in general to unstructured grid.
The characteristics of in view of oil film radial dimension very little, in theory, Smoothing dynamic meshes update mode is more
It is suitable in bearing performance calculating, but mesh distortion occurs.It has been proposed that the dynamic mesh based on elastic deformation updates
Method.This method is similar with the Laplace methods in Smoothing methods.Grid node displacement is calculated as follows：
（1）
（2）
In formula,For the number of plies of film thickness direction grid,For the number of plies where grid node,WithIt is the position of journal centre
Move.
Dynamic mesh adjusting method based on elastic deformation has two：First, once eccentricity is excessive, perpendicular to axle journal
Grid lines just occur knockdown, this grid updating algorithm easily occurs dissipating, stops, dodging and the phenomenon such as moves back, and causes meter
Calculate result inaccurate；Second, such calculation easily causes accumulated error, and long-time numerical behavior has mesh distortion or even negative
The situation of volume.
Make a general survey of Flow Field Calculation dynamic mesh algorithm be used for filmatic bearing performance calculate when, due to filmatic bearing radial dimension compared with
It is small, when grid deforms, it is easy to mesh distortion and negative volume mesh occur, causes bearing performance can not calculate or accumulate
Error is larger.
The content of the invention
The present invention in order to solve to exist in the prior art bearing film grid length-width ratio it is excessive easily in dynamic mesh occur
The problem of mesh distortion, there is provided a kind of dynamic mesh update method of the radial oil film bearing based on Fluent.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：A kind of radial direction oil film axle based on Fluent
The dynamic mesh update method held, comprises the following steps：
（1）Create bearing film grid file；
（2）UDF controls writing for macroprogram in Fluent softwares：It is grand including three：Define the grand of each spot speed of journal surface
DEFINE_PROFILE, the grand DEFINE_GRID_MOTION of self-defined dynamic mesh update mode and for creating grid node number
According to the self-defined grand DEFINE_GRID_MOTION of text；
（3）Start fluid calculation software Fluent, import grid file, carry is used to create the grand of grid node data text
DEFINE_GRID_MOTION, obtains grid node data file；
（4）Using Excel instruments to step（3）In obtained data file handled；
（5）Start fluid calculation software Fluent, import grid file, carry UDF programs simultaneously set UDF control conditions；
（6）Utilize UDF dynamic mesh programme-control Flow Field Calculations；
（7）Judge whether journal centre track restrains.
Described step（1）Specially：The type and Meshing Method of finite elements are chosen according to research object, by
Computational flow is divided into hybrid grid in mesh generation software Gambit, oil inlet and oil-feed slot part for bearing film
Using unstructured grid, structured grid is used to oil film part.
Described step（2）In, become bit rate because journal centre is present, its coordinate is in time changing, so axle journal table
The speed of face each point is calculated according to the formula of relative motion, and the speed values for calculating each point are different, grand by writing
The speed of DEFINE_PROFILE programme-control journal surface each points.
Described step（2）In, write, controlled using the grand DEFINE_GRID_MOTION renewals for carrying out dynamic mesh program
The grid lines direction that system points to journal centre does not change all the time, so as to avoid grid from tilting, reduces and calculates cumulative errors.
Described step（2）In, in Fluent softwares, utilize self-defined Dynamic mesh calculation bearing oil film characteristic
When, it is necessary to 4 texts be set up to record the dynamics data of each time step, based on being walked by future time
Calculate；The oil-film force that the record axle journal of file 1 is received；File 2 records the coordinate of the journal centre of each time step；File 3 records each
The change bit rate of the journal centre of time step；File 4 records the coordinate of bearing shell.
Described step（3）In, in Fluent softwares, all grid nodes in Precise Control of Oil film, it is necessary to obtain
Global numbering, the place number of plies and the unit vector relative to journal centre of grid node are taken, and these data are stored in text
In part 5, with easy-to-look-up and control；Five texts of the above need to be compiled using grand DEFINE_GRID_MOTION programs
Write, compiled program is performed in dynamic mesh preview, obtain required above-mentioned grid node text.
Described step（5）In, the setting of control condition is respectively：
Problem Setup are set：Mixture models are selected, lubricating oil physical parameter, the quality between liquid phase and gas phase is defined
Transmission selection Singhal gasification modes, are set in inlet pressure, oil-out pressure and operating pressure, selection of speed UDF
Defined grand DEFINE_GRID_MOTION in the grand DEFINE_PROFILE of definition, dynamic mesh selection UDF；
Solution is set：Pressure-velocity coupling terms select continuity residual error, speed residual error, gas phase in PISO, monitor residual
Difference is respectively provided with, the mass flow of monitoring oil inlet and oil-out, and remaining keeps default setting；Initialize flow field zero setting；
Time step is set to 0.0001 ~ 0.0005, and time step number is 10000；Remaining acquiescence, clicks on Calculate and calculates.
Grid is set not to be distorted deformation, it is necessary to which the grid lines direction for pointing to journal centre does not change all the time, hangs down all the time
Directly in journal surface, it is distributed, makes radially while to ensure that the grid lines of the radial direction before and after mobile is along the circumferential direction first-class
The angle of grid lines is equal, that is, the grid lines before moving is conllinear or parallel with the grid lines after movement；Described step（6）In
Computational methods are specially：
Assuming that before mobile and after movement, the central point of bearing is respectivelyWith, the central point of the axle journal after mobile preceding and movement
ForWith, oil film grid is divided into radial directionsLayer grid, it is assumed thatForMomentIt is any on layer grid to treat more
New node,For nodeCorresponding after renewalLayer grid node；Oil-film force, the axle journal received according to axle journal this moment are sat
Mark, journal centre's change bit rate, journal mass can draw subsequent timeJournal centre's coordinate, according to journal centre's coordinate
Unit vector with the node with respect to journal centre, does ray difference quadrature axis neck circle and bearing circle in point、, according to movement
Front and rear grid lines is conllinear or parallel, it is known thatWithIt is parallel or conllinear；Unknown point is known againThe number of plies at place is, i.e.,
It is known,For bearing radius,For axle journal radius；Coordinate derivation algorithm step
It is as follows：
（1）, obtain；
（2）, it is knownUnit normal vector, due toWithCollinearly, so drawingUnit normal vector
As；
（3）, solveWithIncluded angle cosine
（4）, utilize triangular relationship formula solve
（5）, obtain
（6）、, it is known thatCoordinate, you can obtainCoordinate.
Described step（5）Specially：An initial velocity and initial displacement are set first, pass through udf functions DEFINE_
GRID_MOTION calculates oil-film forceWith, further according to Newton's second law calculate the time step journal centre's coordinate,
Speed；If desired, calculating the centre coordinate and speed of bearing shell again；The data calculated are directed respectively into corresponding text
This document：File 1, file 2, file 3 and file 4；Grid is accurately controlled using file 5 simultaneously, grid updating is carried out,
Enter next time step after the time step inner iteration is complete；Next time step uses file 2, file 3 and the last time of file 4
The numerical value of preservation；Circulated with this, until journal centre levels off to a fixed point or stable track；When journal centre track tends to
One fixed point, or journal centre's stability-of-path be a certain closed curve when, be judged as convergence, otherwise continue executing with step（4）Directly
Untill stabilization.
Using above-mentioned technical proposal, it is excessive easy in dynamic mesh motion that the present invention solves bearing film grid length-width ratio
The problem of generation mesh distortion, it is ensured that the grid lines of radial direction is along the circumferential direction first-class before and after mobile is distributed.Utilize this
During method calculates dynamic mesh node coordinate, make grid lines all the time perpendicular to journal surface, grid is not distorted deformation,
The cumulative errors of grid computing are avoided, the calculating speed of bearing performance is accelerated.
Brief description of the drawings
Fig. 1 is the renewal flow chart of the present invention；
Fig. 2 is the renewal algorithm principle schematic diagram of flow field grid in the present invention；
Fig. 3 is bearing shell by sine excitation device exciting schematic diagram；
Fig. 4 is bearing film grid chart；
Fig. 5 is journal centre trajectory diagram of the bearing shell by sine excitation.
Embodiment
Technical scheme is described further in conjunction with the embodiments.
Bearing shell is as shown in Figure 3 by vibrator exciting control structure sketch.The motion of bearing shell is controlled using Displacement excitation device,
To investigate the influence of the amplitude and phase of vibrator to axle center trail.The parameter of example is shown in Table 1.
The bearing of table 1, rotor and lubricating oil physical parameter
As Figure 1-4, the grid node renewal in Fluent softwares dynamic mesh more new technological process is the displacement according to axle journal, bearing shell
Determine.The core of grid updating mode is to solve for the algorithm of node coordinate, and its grid node resolution principle figure is as shown in Figure 2.
A kind of dynamic mesh update method of radial oil film bearing based on Fluent based on the present invention, calculates what filmatic bearing was supported
The orbit of shaft center of rotor, comprises the following steps：
（1）The type and Meshing Method of finite elements are chosen according to research object, by means of mesh generation software Gambit
Computational flow is divided into hybrid grid, the oil inlet and oil-feed slot part for bearing film use unstructured grid, right
Oil film part uses structured grid.
（2）UDF controls writing for macroprogram in Fluent softwares：Become bit rate because journal centre is present, its coordinate exists
Time changing, so the speed of journal surface each point is calculated according to the formula of relative motion, calculates the number of speed of each point
Value is different, by the speed for writing grand DEFINE_PROFILE programme-control journal surface each point；Utilize grand DEFINE_
The renewal that GRID_MOTION carries out dynamic mesh program is write, and the grid lines direction that journal centre is pointed in control does not change all the time, from
And avoid grid from tilting, reduce and calculate cumulative errors；The global of grid node is obtained using grand DEFINE_GRID_MOTION to compile
Number, initial coordinate and the place number of plies.Define the grand DEFINE_PROFILE of each spot speed of journal surface（It is named as rot）, from
Define the grand DEFINE_GRID_MOTION of dynamic mesh update mode（It is named as dynamic）With for creating grid node data
The self-defined grand DEFINE_GRID_MOTION of text（It is named as node）.
（3）Data transfer text is set：File 1 is that force.txt reads in the oil-film force that each time step axle journal is received；
File 2 is weiyi.txt, reads and writes the displacement of the journal centre of each time step；File 3 is vel.txt, reads and writes each time step
Journal centre change bit rate；File 4 is bearing.txt, reads and writes the displacement of bearing shell.
（4）Fluent14.0 softwares are opened, grid model is imported, selection size is mm, carry udf.c files, in dynamic net
All node regions are selected in lattice, the grand node of carry performs a grid preview, generation grid node data file node.txt
（Vector of the packet containing node with respect to originWith the number of plies at place, referred to as file 5）.
（5）The data node.txt of generation is rearranged in Excel forms（By global numbering from small to large suitable
Sequence）.
（6）Selection computation model is Mixture, defines physical parameter, sets input pressure, defines axle journal border rotation speed
Carry grand rot when spending, the grand selection dynamic of dynamic mesh part, initialize flow field, and time step is set to 0.0001, click
Calculate is calculated.The technological core of wherein dynamic mesh is the dynamic mesh update method proposed, and circular is such as
Under：
Reference picture 2, it is assumed that the central point of bearing is respectively before mobile and after movementWith, the mobile preceding axle journal with after movement
Central point isWith, oil film grid is divided into radial directionsLayer grid, it is assumed thatForMomentIt is any on layer grid
Node to be updated,For node.Oil-film force, the axle journal received according to axle journal this moment
Coordinate, journal centre's change bit rate, journal mass can draw subsequent timeJournal centre's coordinate, sat according to journal centre
Mark and the node do ray difference quadrature axis neck circle and bearing circle in point with respect to the unit vector of journal centre、, according to movement
Front and rear grid lines is conllinear（It is parallel）, it is known thatWithIt is parallel（Collinearly）.Unknown point is known againThe number of plies at place is, i.e.,
It is known,For bearing radius,For axle journal radius.Coordinate derivation algorithm step
It is as follows：
（1）, obtain；
（2）, it is knownUnit normal vector, due toWithCollinearly, so drawingUnit normal vector
As；
（3）, solveWithIncluded angle cosine
（4）, utilize triangular relationship formula solve
（5）, obtain
（6）、, it is known thatCoordinate, you can obtainCoordinate.
（7）After calculating terminates, journal centre's track figure line can be generated in Matlab according to weiyi.txt, is sentenced with this
Disconnected convergence or stability.Fig. 5（a）It is the axle center trail figure under 1 micron, out of phase difference to give vibrator amplitude.Fig. 5
（b）It is 120 to give phase difference0, axle center trail figure under different exciting amplitudes.
The present embodiment not makees any formal limitation to shape, material, structure of the present invention etc., every according to this hair
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (9)
1. a kind of dynamic mesh update method of the radial oil film bearing based on Fluent, it is characterised in that：Comprise the following steps：
（1）Create bearing film grid file；
（2）UDF controls writing for macroprogram in Fluent softwares：It is grand including three：Define the grand of each spot speed of journal surface
DEFINE_PROFILE, the grand DEFINE_GRID_MOTION of self-defined dynamic mesh update mode and for creating grid node number
According to the self-defined grand DEFINE_GRID_MOTION of text；
（3）Start fluid calculation software Fluent, import grid file, carry is used to create the grand of grid node data text
DEFINE_GRID_MOTION, obtains grid node data file；
（4）Using Excel instruments to step（3）In obtained data file handled；
（5）Start fluid calculation software Fluent, import grid file, carry UDF programs simultaneously set UDF control conditions；
（6）Utilize UDF dynamic mesh programme-control Flow Field Calculations；
（7）Judge whether journal centre track restrains.
2. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 1, its feature
It is：Described step（1）Specially：The type and Meshing Method of finite elements are chosen according to research object, by means of
Computational flow is divided into hybrid grid by mesh generation software Gambit, and the oil inlet and oil-feed slot part for bearing film are adopted
With unstructured grid, structured grid is used to oil film part.
3. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 1, its feature
It is：Described step（2）In, become bit rate because journal centre is present, its coordinate is in time changing, so journal surface is each
The speed of point is calculated according to the formula of relative motion, and the speed values for calculating each point are different, grand by writing
The speed of DEFINE_PROFILE programme-control journal surface each points.
4. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 3, its feature
It is：Described step（2）In, write using the grand DEFINE_GRID_MOTION renewals for carrying out dynamic mesh program, control refers to
Do not change all the time to the grid lines direction of journal centre, so as to avoid grid from tilting, reduce and calculate cumulative errors.
5. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 4, its feature
It is：Described step（2）In, in Fluent softwares, during using self-defined Dynamic mesh calculation bearing oil film characteristic, need
4 texts are set up to record the dynamics data of each time step, in order to the calculating walked for future time；File
The oil-film force that 1 record axle journal is received；File 2 records the coordinate of the journal centre of each time step；File 3 records each time step
The change bit rate of journal centre；File 4 records the coordinate of bearing shell.
6. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 5, its feature
It is：Described step（3）In, in Fluent softwares, all grid nodes in Precise Control of Oil film, it is necessary to obtain net
Global numbering, the place number of plies and the unit vector relative to journal centre of lattice node, and these data are stored in file 5
In, with easy-to-look-up and control；Five texts of the above need to be write using grand DEFINE_GRID_MOTION programs,
Compiled program is performed in dynamic mesh preview, required above-mentioned grid node text is obtained.
7. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 6, its feature
It is：Described step（5）In, the setting of control condition is respectively：
Problem Setup are set：Mixture models are selected, lubricating oil physical parameter, the quality between liquid phase and gas phase is defined
Transmission selection Singhal gasification modes, are set in inlet pressure, oil-out pressure and operating pressure, selection of speed UDF
Defined grand DEFINE_GRID_MOTION in the grand DEFINE_PROFILE of definition, dynamic mesh selection UDF；
Solution is set：Pressure-velocity coupling terms select continuity residual error, speed residual error, gas phase in PISO, monitor residual
Difference is respectively provided with, the mass flow of monitoring oil inlet and oil-out, and remaining keeps default setting；Initialize flow field zero setting；
Time step is set to 0.0001 ~ 0.0005, and time step number is 10000；Remaining acquiescence, clicks on Calculate and calculates.
8. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 7, its feature
It is：Grid is not distorted deformation, it is necessary to which the grid lines direction for pointing to journal centre does not change all the time, all the time perpendicular to
Journal surface, is distributed while to ensure that the grid lines of the radial direction before and after mobile is along the circumferential direction first-class, makes radial grid
The angle of line is equal, that is, the grid lines before moving is conllinear or parallel with the grid lines after movement；Described step（6）In calculating
Method is specially：
Assuming that before mobile and after movement, the central point of bearing is respectivelyWith, it is mobile before and it is mobile after the central point of axle journal beWith, oil film grid is divided into radial directionsLayer grid, it is assumed thatForMomentIt is any to be updated on layer grid
Node,For nodeCorresponding after renewalLayer grid node；The oil-film force received according to axle journal this moment, axle journal coordinate,
Journal centre, which becomes bit rate, journal mass, can draw subsequent timeJournal centre's coordinate, according to journal centre's coordinate and
The node does ray difference quadrature axis neck circle and bearing circle in point with respect to the unit vector of journal centre、, before movement
Grid lines is conllinear or parallel afterwards, it is known thatWithIt is parallel or conllinear；Unknown point is known againThe number of plies at place is, i.e.,
Know,For bearing radius,For axle journal radius；Coordinate derivation algorithm step is such as
Under：
（1）, obtain；
（2）, it is knownUnit normal vector, due toWithCollinearly, so drawingUnit normal vector
As；
（3）, solveWithIncluded angle cosine
（4）, utilize triangular relationship formula solve
（5）, obtain
（6）、, it is known thatCoordinate, you can obtainCoordinate.
9. a kind of dynamic mesh update method of radial oil film bearing based on Fluent according to claim 8, its feature
It is：Described step（5）Specially：An initial velocity and initial displacement are set first, pass through udf functions DEFINE_
GRID_MOTION calculates oil-film forceWith, further according to Newton's second law calculate the time step journal centre's coordinate,
Speed；If desired, calculating the centre coordinate and speed of bearing shell again；The data calculated are directed respectively into corresponding text
This document：File 1, file 2, file 3 and file 4；Grid is accurately controlled using file 5 simultaneously, grid updating is carried out,
Enter next time step after the time step inner iteration is complete；Next time step uses file 2, file 3 and the last time of file 4
The numerical value of preservation；Circulated with this, until journal centre levels off to a fixed point or stable track；When journal centre track tends to
One fixed point, or journal centre's stability-of-path be a certain closed curve when, be judged as convergence, otherwise continue executing with step（4）Directly
Untill stabilization.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109977475A (en) * | 2019-02-28 | 2019-07-05 | 浙江大学 | A kind of dynamic mesh update method for 3 D complex pipeline fluid and structural simulation |
| CN109992918A (en) * | 2019-04-11 | 2019-07-09 | 新余学院 | A kind of characterizing method that high-silicon aluminum alloy cylinder sleeve surface silicon particle shape influences its frictional behaviour |
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| CN111222291A (en) * | 2019-12-30 | 2020-06-02 | 太原重工股份有限公司 | Oil film fluid domain discretization method |
| CN112989722A (en) * | 2021-03-12 | 2021-06-18 | 南京工程学院 | Reynolds boundary condition calculation method based on dynamic grid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109977475A (en) * | 2019-02-28 | 2019-07-05 | 浙江大学 | A kind of dynamic mesh update method for 3 D complex pipeline fluid and structural simulation |
| CN109992918A (en) * | 2019-04-11 | 2019-07-09 | 新余学院 | A kind of characterizing method that high-silicon aluminum alloy cylinder sleeve surface silicon particle shape influences its frictional behaviour |
| CN111062172A (en) * | 2019-12-18 | 2020-04-24 | 哈尔滨工程大学 | Autonomous swimming simulation method based on FLUENT moving grid technology for mink fish model |
| CN111062172B (en) * | 2019-12-18 | 2022-12-16 | 哈尔滨工程大学 | Autonomous swimming simulation method based on FLUENT moving grid technology for mink fish model |
| CN111222291A (en) * | 2019-12-30 | 2020-06-02 | 太原重工股份有限公司 | Oil film fluid domain discretization method |
| CN111222291B (en) * | 2019-12-30 | 2023-03-10 | 太原重工股份有限公司 | Oil film fluid domain discretization method |
| CN112989722A (en) * | 2021-03-12 | 2021-06-18 | 南京工程学院 | Reynolds boundary condition calculation method based on dynamic grid |
| CN112989722B (en) * | 2021-03-12 | 2023-08-15 | 南京工程学院 | Reynolds boundary condition calculation method based on dynamic grid |
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Application publication date: 20171020 |